Firefighters responding to an open-area blaze Saturday night found an unresponsive woman who was later declared dead.

At about 11:15 p.m., Savannah Fire & Emergency Services responded to a dead-end area at Pritchard Street and Lousiville Road after calls about the fire.

Firefighters had to breach a chain-link fence before the flames could be extinguished, said Mark Keller, Savannah Fire spokesman. Firefighters found the woman unresponsive in the area while battling the fire, Keller said.

Keller said an autopsy was performed Monday on the woman, who appeared to be middle-aged, but the medical examiner has labeled the cause of death undetermined pending toxicology results.

The Savannah-Chatham police department on Monday afternoon had not yet released the woman’s identity.

In the area where the fire occurred was a make-shift shelter put together with plywood, tree branches and other material, Keller said. A gas generator was being used supply electricity via extension cords to appliances and there were propane heaters in use, he said.

“Everything was combustible,” Keller said of the structure. “When the fire broke out, it was an easy target for destruction.”

As of Monday afternoon, Savannah Fire investigators had not yet determined the exact cause of the fire.